Oil cushion brake ring insert for spinning and like machines



July 26, 1 YOSHIO KODAMA OIL. CUSHION BRAKE RING INSERT FOR SPINNING AND LIKE MACHINES 2 Sheets-Sheet 1 Filed Aug. 6, 1957 /7 1 7 A, 4 fl /o 6 Y a I N V ENTOR ATTORNEYS July 26, 1960 YOSHlO KODAMA OIL CUSHION BRAKE RING INSERT FOR SPINNING AND LIKE MACHINES 2 Sheets-Sheet 2 Filed Aug. 6, 1957 INVENTOR ATTORNEYS United States Patent OIL CUSHION BRAKE RING INSERT FOR SPINNING AND LIKE MACHINES Filed Aug. 6, 1957, Ser. No. 676,677

1 Claim. 01. 57-134 This invention relates to improvements in an oil cushion brake ring insert for spinning and like machines, and particularly to supporting means for insert tubes of said insert.

The oil cushion brake ring insert of known type is mounted on the bolster by the following means. A screw attached to the bolster is engaged'with a slot provided in a floating lock sleeve of said insert and a semispherelike contact surface of the insert is supported spring-loadedly on a semispherelike seat provided directly on the upper part of the bolster. Since the inner diameter of the bolster of this type is made large enough for inserting the floating lock sleeve, it becomes necessary to lengthen the outer diameter of the semispherelike seat and, in turn, the outer diameter of the bolsterin order toprovide a suflicient area for the semispherelikeseat. The diameter of the wharve which is to be mounted outside the bolster is extended, in turn, inevitably. The extension ofthe diameter of a wharve results in a necessity of a'high speed rotation of a tin roller for a high speed rotation of a spindle. Thus the large mass of the tin roller so rotated at a high speed results in an increase of vibration in view of the structure of the frame ending in an increase in the power consumption of the spinning and like machines.

One object of this invention is to provide an oil cushion brake spindle insert of the class described wherein the defects as above are cancelled.

Another object of this invention is to provide an oil cushion brake spindle insert suitable to use for a high speed rotation.

Other objects and advantages of the present invention will appear from the following description and appended claim, when considered in connection with the accompanying drawings showing some preferred embodiments of this invention, in which:

Figure 1 is a front elevation with a fractional section showing a basic embodiment of this invention, the inside view not shown being the same with that of the section in Fig. 3;

Figure 2 is a front elevation with a fractional section showing another embodiment of this invention, the inside view not shown being the same with that of the section in Fig. 3;

Figure 3 is a front elevational section showing further another embodiment of this invention; and

Figure 4 shows a prior design as a front elevation with a fractional section for facilitating a comparison of the present invention with the prior art.

Referring first to Figure -4, a conventional design of the oil cushion brake ring insert will be explained. There is an insert tube 1 consisting of a main member of an insert, which includes a semispherelike convex contact surface 2 at the upper part thereof. An oil cushion ring or oil damping sleeve 3 is held fixedly on the lower part of the insert tube 1. A floating lock sleeve 30 surrounds said insert tube 1 and a cylindrical flange 31 forming the upper part of a bolster 6 is arranged amound a floating A 2,946,179 H Patented July 26, 1960 lock sleeve 30. A semispherelike concave seat 32 is formed in the top of cylindrical part 31. Said contact surface 2 is adapted to seat in seat 32. Said floating lock sleeve 30 is attached to the cylindrical part 31 by means of a screw 33. In the above construction, it is inevitable that the area of the semispherelike concave seat 32 becomes smaller than the area of'the semispherelike convex contact surface 2 by the cross-sectional area of the floating lock sleeve 30. Said oil cushion damping sleeve 3* is springloaded against the floating lock sleeve 30 by means of a spiral spring 5. The numeral 7 indicates a wharve. The top part 8 of the insert tube 1 contains a roller bearing 9 similar to the construction shown in Figure 3, which supports a spindle blade 10. A flange 11 is provided at the upper part of the bolster 6, which is secured on a spindle rail 12 by means of a securing nut 13. The numeral 14 indicates a skirt of the wharve 7.

Referring now to Figure l, a preferred form of the present invention will be explained. There is an insert tube 1 of which a main member of an insert is composed. The insert tube 1 includes a semispherelike convex contact surface2 at the upper part thereof. An oil cushion ring or oil damping" sleeve 3 is held engaging with the lower part of the insert tube 1. Said insert tube 1 is supported by'a bearing cylinder 4, said semispherelike convex contact surface 2 being held by a semispherelike concave seat 4' provided on the entire top surface of the bearing cylinder 4 directly and a slight clearance being kept between the cylindrical portions of the bearing cylinder 4 and the insert tube 1 so as to be slidable with each other. Said oil cushion damping sleeve 3 is spring-loaded against the bearing cylinder 4 by means of a spiral spring 5. There is a bolster 6, within the upper part of which the i'ower part of the bearing cylinder isscrewed firmly. The numeral '7 indicates a wharve. The top part 8 of the insert tube 1 contains a roller bearing 9 (Fig. 3) which supports a spindle blade 10. A flange 11 is provided at the top of the bolster 6, which is secured on a spindle rail 12 by means of a securing nut 13. The numeral 14 indicates a skirt of the wharve 7.

Another embodiment shown in Fig. 2 includes certain parts identical with those of preceding embodiment, namely the insert tube 1, the semispherelike convex contact surface 2, the damping sleeve 3, the bearing cylinder 4, the spiral spring 5, the bolster 6, the wharve 7, the top part 3 of the insert tube, the roller bearing 9, the spindle blade 10, the spindle rail 12, and the skirt 14. According to this embodiment, however, the bearing cylinder 4 is provided with a flange 15 formed integrally therewith and fixed to the spindle rail 12 by means of the engagement of a securing nut with a threaded portion of the cylinder. The threaded portion of bearing cylinder 4 extends downwards beyond the spindle rail 12 and threadedly engages within the internally threaded top of the bolster 6. The numeral 17 indicates a gasket.

In another embodiment of this invention shown in Fig. 3, the parts, the insert tube 1, the semispherelike convex contact surface 2, the damping sleeve 3, the hearing cylinder '4, the spiral spring 5, the bolster 6, the wharve 7, the top part 8 of the insert tube, the roller bearing 9, the spindle blade 10, the flange 11, the spindle rail 12, the securing nut 13, and the skirt 14, are same with the first-named embodiment. However, a floating sleeve 18 is provided below the bearing cylinder 4, the insert tube 1 being inserted within the floating sleeve 18 loosely. A slit 19 is provided in the floating sleeve 13, with which a locking screw 29 is engaged loosely so that the floating sleeve 18 is attached in such a manner that the same is movable vertically. The locking screw 20 extends into the slit 19 through the wall of the bolster 6. A spiral spring 5 is inserted between the bottom of the floating sleeve 18 and the top of the damping sleeve 3.

There are a footstep bearing 21, a brake ring 22, oil ports 23 and 24, a step point 25, a book 26, a hook screw 27, a coil spring 2,8,;and a washer 29. g k

According to this invention,-thebearing cylinderni is fi tedon the bolster 6 in the specifiedmanner as above. .'I'hesen 1ispherelike concave seat is formed on the .upper part of the bearing cylinder 4, which supports the semispherelike convex contact surface 2 of the insert tube 1.

This invention is characterized by the broadened hearing area relative to the same outer diameter of the semi,- spherelike seat with the conventional typeon'the ground that the semipherelike seat is provided on the bearing cylinder which engages with the insert tube directly, whereas the semispherelike seat is provided on the upper part of the bolster itself and the floating lock sleeve is arranged inside the bolster according to the prior type. According to this invention, when a floating lock sleeve is required, it is arranged below the bearing cylinder (see Fig. 3). Therefore, it is not necessary to enlarge the inner diameter of the bolster ending to accommodate the sleeve as in the prior art structure shown in Figure 4. In

other words, it becomes possible to decrease the internal 1 diameter of the wharve and still provide effective contact .of the same area of the semispherelike concave seat with its associated contacting surface, permitting an increase in the speed of rotation of a spindle without increase of the diameter of a tin roller. Thus it is possible to reduce the power consumption of a spinning and like machine.

According to this invention, by virtue of the construction of the bearing cylinder comprising the semispherelike concave seat independently of the bolster, it becomes pos- .sible economically to form the semispherelike concave seat from the most suitable material for the bearing surface since the bearing cylinder is of a smaller internal diameter than that of the bolster. Furthermore, the work becomes easy since the semispherelike concave seat of the bearing cylinder is separate from the bolster.

I claim:

An oil cushion brake ring insert assembly for spinning machines and the like comprising a tubular bolster having an annular :flange adjacent the upper end thereof adapted to seat against a spindle rail having an opening therein, said bolster having an externally. threaded upper portion, and a nut engaging said threaded portion clamping said bolster "to said spindle nail, said bolster being internally threaded at its upperportion, an insert tube in said bolster, an oil damping sleeve fixedly secured to the lower portion of said insert tube, the upper'portion of said sleeve forming a'shoulder, a bearing cylinder having a flange thereon threadedly engaging the interiorly threaded portion of said bolster, said last-mentioned flange seating against the flange of said bolster, said bearing sleeve having a bore therein slightly in'e'xcess of the diameter of said insert tube and in which said insert tube is movable, the lower portion of said bearing sleeve forming a shoulder interiorly of said bolster confronting and spaced from the shoulder formed by said oil damping sleeve, a spring positioned between said first-mentioned and said second-mentioned shoulders, a semispherical concave seat on the entire top surface of said bearing cylinder, and a semispherical conlvex contact surface on said insert tube seating in said concave seat and covering the entire area thereof, a hollow top part on said convex contact surface, a roller hearing in said hollow top part, and a spindle blade extending into said insert tube and contacting said roller bearing.

References Cited in the file of this patent UNITED STATES PATENTS 

